Question

"On the coast there are three lighthouses.

The first light shines for 3 seconds, then is off for 3 seconds.

The second light shines for 4 seconds, then is off for 4 seconds.

The third light shines for 5 seconds, then is off for 5 seconds.

All three lights have just come on together.

1) When is the first time all three lights will be off at the same time?

2) When is the next time all three lights will come on together at the same moment?"

Answer 1

Answer:

hey mate your answer is

Step-by-step explanation:

1) all light is off between 1 second .

2)because light speed is equal off all lights.

............okay..................